Johannes evees



UNITED STATES PATENT OFFICE;

JOHANNES EvERs, OE NEw YORK, N. Y,

CHlSEL-BAR FOR SCRAPING SODA,KETTLES, SLG.

SPECIFICATION forming part of Letters Patent No. 337.488, dated March 9, 1886.

Application filed September 28, 1885. Serial No. 178,599. (No model.)

To @ZZ whom, it may concern-.-

Be it known that I, JOHANNES EvERs, of the city of New York, in the county of New York and State of. New York, have invented certain new and useful Improvements in Chisel-Bars, of which the following is a specification.

This invention relates to an improved chisel-bar that is intended for use in scraping kettles used for boiling soda and other chemicals; and the invention consists of a chiselbar formed of a scraping-knife, a handle-rod attached to said blade, a sleeve inclosing said scraper and having a threaded socket, and a thimble that is provided with an enlarged end and interior screw-threads for engaging, respectively, the threaded socket of the sleeve and a thread on the handle, so that by turning the thimble the sleeve can be adj usted to the size of the scraper as the same is worn off by use.

In the accompanying drawings, Figure 1 represents a side elevatiomwith a part broken away, of my improved chisel-bar. Fig. 2 is a vertical longitudinal section of the same. Figs. 3 and 4 are vertical transverse sections on lines fr and y y, Fig. 1.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents a cutting or scraping knife or blade of suitable size,which is firmly attached to the end of a handlerod, B, of suitable length, according to the work to be performed by my implement. The handle-bar is made of gas-pipe, or partly of wood and partly of metal, so as to reduce the weight of the implement. A sleeve, C, incloses the scraping-knife A, and is provided at opposite sides with bulging portions C', for the end of the handle B. The rear end of the sleeve C is contracted, and provided with a socket, d, having an exterior screw-thread. A thimble, D, having an enlarged front end, d', with an interior screw-thread, engages the socket d of the sleeve C. rIhe main part of the thimble D is made of a smaller diameter than the end d', and provided with an interior screw-thread at one part thereof, which takes into a thread of the handle-rod B, so that the front end, d', of the thimble D can be screwed upon thethreaded socket d of the sleeve C, while the main part of the thimble is screwed forward on the threaded portion of the handlerod B. The sleeve C protects the main part of the cutting or scraping knife A, while `the projecting end of the same is worn out by use. The cutting-iron is then fed forward, so as to expose the next adjoining part of the same, which is accomplished by first unscrewing the thimble D from the socket d of the sleeve C, then moving the sleeve back on t-he scraper, and next screwing thimble D forward, so that it re-engages the socket d of the sleeve by its threaded front end, d'. The sleeve is thereby rigidly locked in position, so that the main part of the scraper is protected. By thus gradually feeding the cutting or scraping knife forward it can be used up nearly entirely without requiring sharpening and rcternpering, as the cutting-edge is sharpened bythe scraping action of the soda or other chemicals that are to be scraped off from the kettles.

The advantages of my improved chisel-bar are, first, that the expensive drawing out, filing, and tempering of the ends of the chiselbars heretofore in use is done away with, which causes considerable expense, especially as the edges are dulled and worn out after a few days work; secondly, that the cuttingiron can be used to its full extent, and rey quil-es no sharpening, as it sharpens itself by work; thirdly, that the adjusting and forward feeding of the iron is accomplished easily and quickly, so that the tool is immediately ready for work again.

Having thus described myinvention, I claim as new and desire to secure by Letters Patentl. A chisel-bar consisting of a scrapingknife, a handle-rod attached to said scrapingknife, a sleeve surrounding said cutting-knife and having a threaded socket at the rear end, and an adjusting thimble having interior screw-threads for engaging a threaded portion of the handle-bar and the threaded socket of the sleeve, substantially as set forth.

2. A chisel-bar consisting of a scrapingknife, a handle-rod attached to said knife, a'. In testimony that I claim the foregoing as sleeve having buiging' sides and an exterimy invention I have signed my name in presorly-threaded rear socket, and a thilnble havence of two subscribilnglr Witnesses.

ing an enlarged and interiorly-threaded front JOHANNES EVERS. 5 end and an interiorly-thrended body that Witnesses:

engages a thread on the handle-bar, substan- ERNST VVOLFF7 tially as set forth. MARTIN PETRY. 

